Answers

Add 21/84 and 45/30

1^st number: 21/84, 2^nd number: 1 15/30

21/84 + 45/30 is 7/4.

Steps for adding fractions

1. Find the least common denominator or LCM of the two denominators:
   LCM of 84 and 30 is 420
   
   Next, find the equivalent fraction of both fractional numbers with denominator 420
2. For the 1st fraction, since 84 × 5 = 420,
   21/84 = 21 × 5/84 × 5 = 105/420
3. Likewise, for the 2nd fraction, since 30 × 14 = 420,
   45/30 = 45 × 14/30 × 14 = 630/420
4. Add the two like fractions:
   105/420 + 630/420 = 105 + 630/420 = 735/420
5. 735/420 simplified gives 7/4
6. So, 21/84 + 45/30 = 7/4
   In mixed form: 13/4

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